After a quick look at Wikipedia's article for this somewhat foggy type of technology, I stumbled upon a website with podcasts about how to do things on a Mac - including software and hardware tools!
Take a look here: http://screencastsonline.com/sco/
A multimedia broadcast that can be detected using RSS/Atom. Allows a podcaster to upload multimedia such as videos, pictures and audio to a hosting server, create an RSS feed that points to it, and allows anyone to download the media via the details provided in each RSS entry. May be used for interviews, video tutorials, news broadcasts or topic highlights on software and hardware.